Die casting machine

Abstract

The utility model discloses a die-casting machine which comprises a die, a sprue bush is arranged at a sprue of the die, a charging barrel is connected to the sprue bush, an injection head is arranged in the charging barrel and driven by a driving mechanism, the die-casting machine further comprises a heat preservation furnace, a liquid injection pipe is arranged on the heat preservation furnace, and the upper end of the liquid injection pipe is connected with the sprue bush. The injection stroke can be shortened, and the heat loss of alloy liquid is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting machine technical field more particularly, relate to a die casting machine. BACKGROUND

[0002] Pressure casting is a kind of special casting. By pouring molten or semi-molten metal into the pressure chamber of die casting machine, under the action of high pressure, the metal liquid fills the cavity of die casting mold at high speed, and the molten or semi-molten metal is cooled and solidified under high pressure to obtain the high-efficiency, high-efficiency precision casting method. The surface precision and size control of die casting is relatively high, and the die casting of complex structure can be die cast. With the development of science and technology and the implementation of global lightweight technology, the wall thickness requirement of the casting is thinner and thinner. The filling temperature of alloy liquid is the key factor affecting the design of casting wall thickness. In theory, the higher the temperature of alloy liquid, the better the forming of casting. But the temperature of alloy liquid cannot be infinitely increased, which will cause the difference of casting microstructure, coarse grain and serious influence on the mechanical properties of casting. We need to find ways to reduce the heat loss of alloy liquid from the heat preservation furnace to the mold cavity. Although we can use some heat preservation methods, such as using mold temperature machine and heating material pipe, but it will increase the cost, and the effect is still limited. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the deficiency of prior art, and provides a die casting machine.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model discloses a die casting machine, including the mold, the sprue bushing is set to the mold, and the sprue bushing is connected with the material cylinder, and the material cylinder is provided with the injection head, and the injection head is driven by the drive mechanism,

[0006] It also includes a heat preservation furnace, and the heat preservation furnace is provided with a liquid injection pipe, and the upper end of the liquid injection pipe is connected with the sprue bushing.

[0007] Further, the mold includes a movable mold and a fixed mold, and the sprue bushing is installed in the fixed mold.

[0008] Further, it also includes a movable mold plate and a fixed mold plate, the movable mold is installed on the side close to the fixed mold plate of the movable mold plate, and the fixed mold is installed on the side close to the movable mold plate of the fixed mold plate.

[0009] Further, the heat preservation furnace is arranged below the mold.

[0010] Further, the drive mechanism is an accumulator.

[0011] Further, the material cylinder penetrates the fixed mold plate, and the material cylinder is provided with a material injection port on the part penetrating out of the fixed mold plate, and the material injection port is located on the upper part of the material cylinder.

[0012] The alloy liquid directly enters into the sprue bush, so that the alloy liquid is located at the position closest to the cavity, the injection stroke is shortened, the heat loss is reduced, and the casting quality is better. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 Fig. 1 is a structural schematic view of a die casting machine in a liquid supply state in the embodiment of the present application;

[0014] Fig. 2 Fig. 2 is a structural schematic view of the die casting machine in an injection state in the embodiment of the present application;

[0015] Fig. 3 Fig. 3 is a structural schematic view of the die casting machine in a pressure casting state in the embodiment of the present application.

[0016] Fig. 1 is a structural schematic view of a die casting machine in a liquid supply state in the embodiment of the present application; DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0018] As shown in Fig. 1, a die casting machine comprises a mold, the mold comprises a movable die 6 and a fixed die 7, a sprue bush 9 is arranged at a sprue of the mold, the sprue bush 9 is installed in the fixed die 7, a barrel 8 is connected to the sprue bush 9, the barrel 8 is arranged through the fixed die 7, a pressure head 11 is arranged in the barrel 8, the pressure head 11 is driven by a driving mechanism 3, and the driving mechanism 3 is an accumulator. The die casting machine further comprises a movable die plate 4 and a fixed die plate 5, the movable die plate 4 is installed with the movable die 6 on one side close to the fixed die plate 5, and the fixed die plate 5 is installed with the fixed die 7 on one side close to the movable die plate 4. Figs. 1-3

[0019] ​The heat preservation furnace 1 is provided with a liquid injection pipe 2 connected with a gas pump, and the alloy liquid is supplied by the gas pump. The upper end of the liquid injection pipe 2 is connected with a sprue bush 9. During the die casting, the injection head 11 moves forward to the sprue bush 9. The alloy liquid in the heat preservation furnace 1 is lifted to the sprue bush 9 by the air pressure, and the alloy liquid is located between the injection head 11 and the sprue of the mold. After the alloy liquid injection is completed, the driving mechanism 3 drives the injection head 11 to move, and the connecting port of the liquid injection pipe 2 and the sprue bush 9 is closed. Then the quick injection and pressure increase are started, the alloy liquid is filled into the mold cavity, and the casting is formed under the pressure. The alloy liquid can be directly supplied to the position closest to the casting by using the die casting method, the process is shortened to the maximum, the heat loss is reduced, and the energy cost is reduced. The method is especially suitable for the casting with complex structure and thin wall thickness.

[0020] The heat preservation furnace 1 is arranged below the mold, and the connection between the liquid injection pipe 2 and the sprue bush 9 is facilitated.

[0021] Further, the barrel 8 is arranged through the fixed mold plate 5, the barrel 8 is provided with a material injection port 10 at the upper portion of the barrel 8, and the material injection port 10 is arranged at the portion of the barrel 8 penetrating out of the fixed mold plate 5. For ordinary castings, the conventional die casting method can still be used, the valve on the liquid injection pipe 2 is closed, and the connection between the liquid injection pipe 2 and the sprue bush 9 is disconnected. The alloy liquid is poured into the barrel 8 from the material injection port 10, and then the alloy liquid is pushed by the injection head 11, and the low-speed slow injection action is adopted to discharge the gas in the barrel 8. With the advancement of the injection head 11, the alloy liquid gradually rises, and when the alloy liquid reaches the sprue, the slow injection is changed to the quick injection, the alloy liquid is quickly filled into the mold cavity, and the pressure increase is started at the same time, so that the casting is solidified and crystallized under high pressure to form the casting.

[0022] The preferred embodiments of the utility model are described above, the protection scope of the utility model is not limited to the above-mentioned embodiments, and the technical solutions under the idea of the utility model all belong to the protection scope of the utility model. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model are also regarded as the protection scope of the utility model.

Claims

1. A die casting machine characterized by comprising: The utility model relates to a kind of injection molding machine, including mould, the gate of the mould is provided with gate bushing (9), the nozzle (8) is connected on the gate bushing (9), the nozzle (8) is provided with injection head (11) inside, the injection head (11) is driven by driving mechanism (3), further including holding furnace (1), the holding furnace (1) is provided with injection tube (2), the upper end of the injection tube (2) is connected with gate bushing (9).

2. The die casting machine according to claim 1, wherein The mould includes movable mould (6) and fixed mould (7), and the gate bushing (9) is installed in the fixed mould (7).

3. A machine as claimed in claim 2, wherein Further including movable mould plate (4) and fixed mould plate (5), the movable mould (6) is installed on the side close to the fixed mould plate (5) of the movable mould plate (4), and the fixed mould (7) is installed on the side close to the movable mould plate (4) of the fixed mould plate (5).

4. The die casting machine of claim 1 wherein, The holding furnace (1) is arranged below the mould.

5. The die casting machine of claim 1 wherein, The driving mechanism (3) is an accumulator.

6. The die casting machine of claim 1 wherein, The nozzle (8) is arranged through the fixed mould plate (5), and the nozzle (8) is provided with a material injection opening (10) at the portion penetrating out of the fixed mould plate (5), and the material injection opening (10) is located at the upper portion of the nozzle (8).

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